importjava.awt.EventQueue;importjava.awt.event.ActionEvent;importjava.awt.event.ActionListener;importjava.text.SimpleDateFormat;importjava.util.Calendar;importjava.util.D...

import java.awt.EventQueue;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JTextField;

import javax.swing.Timer;

public class timetext {

private JFrame frame;

/**

* Launch the application.

*/

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

timetext window = new timetext();

window.frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

}

});

}

public timetext() {

initialize();

}

private void initialize() {

frame = new JFrame();

frame.setBounds(100, 100, 450, 300);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.getContentPane().setLayout(null);

String s=String.format("%tY-%tm-%td %tH:%tM:%tS",new Date(),new Date(),new Date(),new Date(),new Date(),new Date());

JLabel lblNewLabel = new JLabel(s);

lblNewLabel.setBounds(158, 116, 137, 15);

frame.getContentPane().add(lblNewLabel);

frame.setVisible(true);

}

}

能够显示时间，怎么添加代码，使时间能动态显示，即每秒或每分更新一次

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